For 1990-2009 cars only
Upshift in D and D2 at WOT Only for Pontiac Sun Runner - 4WD (Canada) 1997
Checks | Cause |
|---|---|
Vacuum Modulator | Failure |
Modulator Vacuum Line | Leaky or interrupted |
Engine Or Accessory Vacuum System | Leak |
Detent Valve Or Cable | Stuck |
